Improvement in steam engines



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V MPETERS. norommmvuan. WASHINGTON, uc.

@uitrit 'tatr's -`datrnt @ffice HORATIG O. PRRY AND JOHN L. LAY, 0FBUFFALO, NEW YORK Lena-s Parent No. 65,003, dana .my 21, 1er-njIMPROVEMENT Ill STEAM ENGINES.

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TO ALL WHOM IT MAY CONCERN: 1 .I y I Be it known that wc, Hokuto O.Panni' and Jeux L. Lai', both oi' the city of Buffalo, in the county ot"Erie, and the State of New York, have invented-certaiin new and usefulimprovements in Marine Steam Engines; and wc hereby declare that thefollowing is a full and exact description thereof, reference being-hadto the accompanying drawings, making partot' this specification, inwhich' Figure l is ay view' in elevation. Figure i2 is a verticalsection.

lligule'i is'adetached view ott a modification of the stuffing-boxes forpacking the piston between they cylinders.

lFigure 'fi isa detached view representing a different method of packingthe piston-rod, by which one Smiling-box suiiiecs forpacking the rod atboth cylinders.

Figures 5 and (i are a plan .and section. of a. portion' ot' the piston,showing the method oi' applying the packing. v *I Figures 7 and 8 areaplan and elevation of the packing-rings detached.

Like letters indicate corresponding parts in all thc figures.

Our invention relates to that class of vertical engines in which `thcste-ain is first used at high pressure,` and then exhausted intoalow-pressurc cylinder, acting in both upon pistonsv arranged upon thcsame rod. Hithcrto, in someof the engines of this kind, access to thestuling-boxes in the head or partition dividing the two cylinders hasbeen attended with much difliculty and expense, necessitating thcremoval of the outer head and piston freni one cylinder before thestuiiing-bo-x of the inner head could be reached,'in fact, involving thestoppage and taking apart et' the engine before repacking and ordinaryrepairs could be eiTected, and this alone unittc-d them for marinepurposes. Our invention is designed to obviate this objection as well asin other respects to adapt these engines to the purposes of navigation,especially o n 'lake propellers, where, from the largcamount of stew-ageroom required below deck, space for the engine is restricted. Itconsists in the combination and arrangon'iont ot' an intervening chamberbetween the two steam cylinders, whereby the stuffing-boxes are at alltimes rendered accessible without stopping the engine, and in theconstruction of a single st'ufiingbox for packing thc rod in theproximate heads of the two cylinders, and alsovin the combination andarrangement of aman-hole in the bottom plate of said chamber, wherebythc packing may be removed without removing the cylinder head; and inother features hereinafter described.

A s represented in the drawings, A is thc high-pressure cylinder, inwhich the steam'is used directfrom the boiler. The exhaust-pipe C fromthe cylinder leads directly to the valve-chest of the large: cylinder B,in which the steam is employed expansively, acting in both cylinders onpistons D E, affixed to the same rod'F. G G are the valve-chests, H IIthe valves, a a the induction passages, and b the exhaust ports, theformer communicating by the pipe C with cylinder Tt, and the latterleading bythe' pipe J to the condenser. The cylinder Ix' is preferablycast as a. shell, having suitable openings, c c, for entrance throughits'sidcs, its top forming a seat forthe base of cylinder A, and itsbetteln plate fermcdwith a fia-ngc for bolting to the sidesof thc lowercylinder, thereby dispensing with the usual cylinder head. A man-hole,I, with suitable crab and cover, is also provided in the bottom plate,whereby access is readily obtained to the piston E, as will'bcdescribed. It may, however, be Aconstructed with columns, supporting theupper plate, instead of the enclosed' sides, 'with equally goed results.lathe chamber K the stalling-boxes may bc constructed in theordinary'mctl'iod, one for cach cylinder, as lshown at fj', in iig. 2,or as in iig. 3, where a single sleeve, g, provided with external screwdthread workingiu both boxes, forms a gland for both; I prefer, however,th-e construction .shown in g. 4, in which the sleeve i enclosing thepiston-rod passes through-thc lower head of' cylinder' A, and isconnected thereto by means of the shoulder z' below7 and a. flanged',turned over above or on the interior of the head, forming a .steamtightjoint. The lower extremity ot' this sleeve extends nearly to the bottoniplate of the chamber K, terminating in n. stuffing-box, L, therein, andhaving a ring, o, surrounding it below the packing Z. The gland 7csurrounds the sleeve 7i as well as the piston-red, and the `packing iscompressed between it and the ring o, which latter is not in contactwith the rod, and hence not subject to Wear, but intcrvcncs between thesteam and packing. The use of this device dispenses with theconstruction and care of one startling-box, and, in connection with thechamber K, simplifies the construction of this partof the engine. ,Thechamber K, by

admitting space in which to use the man-hole plate I, enables iis tointroduce an improvement inthe piston E, Y

by which the packing-rings may be. removed and replaced'without takingout the piston or removing the cylinder head. We construct the pistonwith an adjustable follower, consisting of a ring, M,\vhich is bolted tothe main casting of the piston, and covers a recess for thepacking-rings rb. By loosening the bolts tt the follower may be raisedsuieiently to admit of the removal of the packing-rings r s, (which areen t into three or more sections, as shown in figs. 7 and 8,)byfhoisting through the man-hole. This is of great importance incylinders of' large diameter in the saving of time and expense.VConnected with the exhaust et' the liigl1-pressure cylinder is astcam'pipe, O, communicating directly with the boiler, so that when theengine is stopped for reversing, steam may, by opening a valvein thispipe, be admitted into the large cylinder in order to reverse quickly.

Our improvements are-particularly adapted to engines used'for lakenavigation, where 'compaetness and simplicity yare demanded, without thesacrifice of power. They nre'of a character which enables the uprightengines now in use onlake propellcrs and other vessels to be modified tothis construction by the addition simply of the casting constituting thechamber K and the high-pressure cylinder' A, with its adjuncts, to thepresent cylinder of those engines.

'What we claim as our invention, and desire to secure by Letters-Patent, is

The combination and arrangement of the shell or frame constituting theintervening chamber K with the two cylinders A' and B, and continuouspiston-rod F, its bottom plate forming the cover of the cylinder B,cor.- structed substantially as and for the purposes herein set forth. I

We also claim the stuling-box, consisting of the sleeve h andpaeltiug-box L, in combination with the chamber K and piston l" andcylinders A B, arranged and; operating substantially as .and for thepurposes set forth. i l y We further claim the combination andarrangement of the man-hole I'with the bottom plate of chamherK, formingthe head of the cylinder B, whereby the adjustable ring M and sectionalpaekingrrings rs of the piston E may be removed, substantially inthemanner and for the purposes herein set forth. i

In witness whereofl we have hereunto signed our names in the presence oftwo subscribing witnesses.

HORATIO O. PERRY, JOHN L. LAY.

Witnesses JAY HYATT, ALBERT HAIGHT.

